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From: vallor <vallor@cultnix.org>
Newsgroups: comp.os.linux.advocacy,alt.comp.os.windows-11
Subject: Re: Kexec (and HyperV) (was: Re: Dimdows Decay Syndrome Continues)
Date: 9 Feb 2025 00:25:51 GMT
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On Sat, 8 Feb 2025 23:42:11 -0000 (UTC), Lawrence D'Oliveiro
<ldo@nz.invalid> wrote in <vo8q4j$8tqo$2@dont-email.me>:

> On 8 Feb 2025 08:44:20 GMT, vallor wrote:
> 
>> On Sat, 8 Feb 2025 06:36:16 -0000 (UTC), Lawrence D'Oliveiro
>> <ldo@nz.invalid> wrote in <vo6u10$3ue2q$1@dont-email.me>:
>> 
>>> Doesn’t RHEL support kexec, which allows the old Linux kernel to pass
>>> control to the new one without actually disrupting the userland?
>> 
>> You're thinking of live kernel patching.  kexec_load(2) load a kernel
>> that you can have execute if the current kernel crashes.  You do this
>> for debugging, usually.
> 
> Bit more than that <https://manpages.debian.org/kexec_load(2)>:
> 
>     The kexec_load() system call loads a new kernel that can be executed
>     later by reboot(2).
> 
> And one of the functions of the latter
> <https://manpages.debian.org/reboot(2)> is:
> 
>     LINUX_REBOOT_CMD_KEXEC
>       (RB_KEXEC, 0x45584543, since Linux 2.6.13). Execute a kernel that
>       has been loaded earlier with kexec_load(2).

I don't see your point.  (That's what I said.)

It doesn't load "without disturbing the userland"...

-- 
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